<template>
  <div>
    <header class="site-header jumbotron">
      <div class="container">
        <div class="row">
          <div class="col-xs-12">
            <h1>请发表对Vue的评论</h1>
          </div>
        </div>
      </div>
    </header>
    <div class="container">
      <Add :addComments="addComment"/>
      <List :comments="comments" :deleteComment="deleteComment"/>
    </div>
  </div>
</template>

<script>
import Add from "./components/Add";
import List from "./components/List";

export default {

  data(){
    return {
      comments:[ // 数据在哪个组件，更新数据的行为（方法）就应该定义在哪个组件
        {
          name: 'Lgx',
          content: "Hello Lgx!"
        },
        {
          name: 'L',
          content: "Hello L!"
        },
        {
          name: 'X',
          content: "Hello X!"
        }
      ]
    }
  },

  methods: {
    // 添加评论
    addComment(comment){
      this.comments.unshift(comment)
    },

    // 删除指定下标的评论
    deleteComment(index){
      this.comments.splice(index, 1)
    }
  },

  components: {
    Add,
    List
  },
}
</script>

<style>

</style>
